Cisco SPA525G2 provisioning with DD-WRT flashed router (TIP)

Just wanted to share a couple of provisioning tips on V.11 with the Cisco SPA 525G phones when using a DD-WRT flashed router.

Under Services\Services
In the DNSMasq additional options at the following, don't forget the quotes as all hell will break loose on your DHCP clients.
dhcp-option=66,"http://IP_OF_3CX_SERVER:5000/provisioning/$MA.xml"

Under Setup/Basic Setup
Make sure the DHCP-Authoritative checkbox is set

Without this checked the phones would not auto provision, I had to set the path on each phone.